topic Voltage Drop = 0V in Revit MEP Forum

Voltage Drop = 0V

Anonymous — Sat, 02 Dec 2017 12:37:51 GMT

UK standard cable is always 0 value on voltage drop in revit 2018 given all of this data

Voltage=230V

Length=16.2meters

Current=.77A

Cable Type - 6491B A (3/4) #1.0mm

Please help. Hoping for your positive response 🙂

Re: Voltage Drop = 0V

fabiosato — Wed, 06 Dec 2017 17:14:58 GMT

Hello,

Unfortunately whenever you don’t use AWG system for wire gauge, drop voltage does not work.

Re: Voltage Drop = 0V

Judy_S — Wed, 06 Dec 2017 20:30:46 GMT

Hi, r.yu,

I'm Judy from Revit Technical Support. I saw your forum post and will be happy to give you the information we have about voltage drop for non-US wires.

Presently, the voltage drop calculation works only in the US Imperial and US Metric templates. This is because the US wire sizes and impedance information for them are hard-coded into Revit, and there's no means for users to add this information for non-US wire sizes.

There's another forum discussion on this topic: Electrical Distribution: Circuit Voltage Drop with some additional information.

If you'd like to suggest that calculations for non-US wire sizes be included in a future release of Revit, I encourage you to post your idea on the Revit Ideas page, or vote for it if someone has already posted it. The more votes an idea gets, the more likely it is to be given consideration by our development team, so it is certainly worth doing.

I hope this answers your question, though I'm sure you were hoping for a different answer! Let me know if you have any other questions or comments.

Best,

Judy_S

Re: Voltage Drop = 0V

Anonymous — Tue, 09 Jan 2018 13:29:44 GMT

Hi Miss Judy,

May I ask is there any way that we could edit manually the Voltage drop on revit or can we convert the panel schedule to excel file exactly the same format 'cause in our company are using UK standard template.

Thank you in advance.

Raymond.

Re: Voltage Drop = 0V

Anonymous — Tue, 09 Jan 2018 13:46:42 GMT

Hi @Anonymous. Try a workaround using project parameters for the variable you need to calculate:

Re: Voltage Drop = 0V

Anonymous — Thu, 18 Jan 2018 22:59:39 GMT

Dear r.yu you can even use conditional statements for show casing the voltage drop values if you have formula for calculating voltage drop.

Re: Voltage Drop = 0V

jondan — Fri, 06 Apr 2018 18:46:08 GMT

When I attempt to see the voltage drop on a feeder (using the Circuit Path option which is so helpful!), I'm also getting 0.00% voltage drop. I'm located in the US (not UK), and am using the standard THWN wire sizes unmodified from that installed with Revit. Is this just because my wire size jumps up above #4/0?

Re: Voltage Drop = 0V

Anonymous — Wed, 11 Apr 2018 20:06:45 GMT

yes bro we can calculate exact voltage drop in revit by using calculated values,just let me know your formula for calculation of voltage drop values .The formula will be same only impedance values for every wire size will change.let me know if you need any help.I mentioned this as i obtained output in my previous project.

Thanks

Amer Syed

Re: Voltage Drop = 0V

ozdemirtamer — Tue, 22 Oct 2019 10:23:11 GMT

I've shared some files... Dyn file calculates voltage drop... I ve used Turkish Standards...

Re: Voltage Drop = 0V

Anonymous — Fri, 21 May 2021 12:12:08 GMT

Hi @ozdemirtamer, I saw your Dynomo files, and i downlanded. But the file didnt open. This reaseon is "error opening corroupted file". Could you load again this forum.

Re: Voltage Drop = 0V

ishuang8MS4S — Wed, 12 Aug 2026 18:40:30 GMT

I am facing the same issue, if you know the solution please let me know. Thanks!

Re: Voltage Drop = 0V

Scott_D_ — Tue, 18 Aug 2026 16:16:28 GMT

Might I suggest picking up a copy of ElectricalOM from Modecsoft to avoid this issue and do the full suite of UK electrical calculations properly.

There is also Etap, Trimble ProDesign 3D, Trimble StabiCAD as well as others.

I would strongly suggest not using a Trimble product for your calculation plugin, they are both terrible and they refuse to make them better. Spend your money elsewhere.